Examples of org.apache.lucene.index.IndexWriter.addDocument()

Class org.apache.lucene.index.IndexWriter

Examples of org.apache.lucene.index.IndexWriter.addDocument()

org.apache.lucene.index.IndexWriter.addDocument()
Adds a document to this index. If the document contains more than {@link #setMaxFieldLength(int)} terms for a given field, the remainder arediscarded.
Note that if an Exception is hit (for example disk full) then the index will be consistent, but this document may not have been added. Furthermore, it's possible the index will have one segment in non-compound format even when using compound files (when a merge has partially succeeded).

This method periodically flushes pending documents to the Directory (see above), and also periodically triggers segment merges in the index according to the {@link MergePolicy} in use.
Merges temporarily consume space in the directory. The amount of space required is up to 1X the size of all segments being merged, when no readers/searchers are open against the index, and up to 2X the size of all segments being merged when readers/searchers are open against the index (see {@link #optimize()} for details). The sequence ofprimitive merge operations performed is governed by the merge policy.
Note that each term in the document can be no longer than 16383 characters, otherwise an IllegalArgumentException will be thrown.

Note that it's possible to create an invalid Unicode string in java if a UTF16 surrogate pair is malformed. In this case, the invalid characters are silently replaced with the Unicode replacement character U+FFFD.

NOTE: if this method hits an OutOfMemoryError you should immediately close the writer. See above for details.
@throws CorruptIndexException if the index is corrupt @throws IOException if there is a low-level IO error

            return false;


          NewsDocument document = new NewsDocument(news.get(i));
          document.addFields(indexDescription);
          document.getDocument().getField(SearchDocument.ENTITY_ID_TEXT).setValue(String.valueOf(i));
          indexWriter.addDocument(document.getDocument());
        }
        indexWriter.close();


        searcher[0] = new IndexSearcher(directory);
      } catch (Exception e) {

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    while (itI.hasNext()) {
      ItemIF item = itI.next();
      if (logger.isDebugEnabled()) {
        logger.debug("Add item " + item + " to index.");
      }
      writer.addDocument(ItemDocument.makeDocument(item));
    }
    writer.optimize();
    nrOfIndexedItems = writer.docCount();
    writer.close();
    logger.info("Finished writing index.");

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    RAMDirectory dir = new RAMDirectory();    
    IndexWriter writer = null;
    try {
      writer = new IndexWriter(dir, analyzer, true);
      writer.setMaxFieldLength(Integer.MAX_VALUE);
      writer.addDocument(doc);
      writer.optimize();
      return dir;
    } catch (IOException e) { // should never happen (RAMDirectory)
      throw new RuntimeException(e);
    } finally {

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        indexWriter.setMergeFactor(INDEX_MERGE_FACTOR); //for better performance
        // 5. Add new Document
        for (int i = 0; i < updateCopy.size(); i++) {
          Document document = updateCopy.get(i);
          log.info("addDocument:" + document);
          indexWriter.addDocument(document);          
        }
        // 6. Close writer
        long startOptimizeTime = 0;
        if (log.isDebug()) startOptimizeTime = System.currentTimeMillis();
        indexWriter.optimize();// TODO:chg: dauert ev. zulange oder nocht noetig

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    try {
      IndexWriter writer = new IndexWriter(ramDir, /*new StandardAnalyzer()/*/XFactory.getWriterAnalyzer());
      Document doc = new Document();
      Field fd = new Field(FIELD_NAME, CONTENT, Field.Store.YES, Field.Index.TOKENIZED,Field.TermVector.WITH_POSITIONS_OFFSETS);
      doc.add(fd);
      writer.addDocument(doc);
      writer.optimize();
      writer.close();
      
      IndexReader reader = IndexReader.open(ramDir);
      String queryString = QUERY;

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    IndexWriter writer = new IndexWriter(ramDir, analyzer, MaxFieldLength.UNLIMITED);
    Document doc = new Document();
    Field fd = new Field(FIELD_NAME, content, Field.Store.YES,
        Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS);
    doc.add(fd);
    writer.addDocument(doc);
    writer.optimize();
    writer.close();


    IndexReader reader = IndexReader.open(ramDir);
    String queryString = QUERY;

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    IndexWriter writer = new IndexWriter(ramDir, analyzer, MaxFieldLength.UNLIMITED);
    Document doc = new Document();
    Field fd = new Field(FIELD_NAME, content, Field.Store.YES,
        Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS);
    doc.add(fd);
    writer.addDocument(doc);
    writer.optimize();
    writer.close();


    IndexReader reader = IndexReader.open(ramDir);
    String queryString = QUERY;

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      directory = new RAMDirectory();   
      iwriter = new IndexWriter(directory, analyzer, true , IndexWriter.MaxFieldLength.LIMITED);
      Document doc = new Document();
      doc.add(new Field("ID", "10000", Field.Store.YES, Field.Index.NOT_ANALYZED));
      doc.add(new Field(fieldName, text, Field.Store.YES, Field.Index.ANALYZED));
      iwriter.addDocument(doc);
      iwriter.close();
      
        //实例化搜索器   
      isearcher = new IndexSearcher(directory);      
      //在索引器中使用IKSimilarity相似度评估器

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    IndexWriter writer = new IndexWriter(ramDir, analyzer, MaxFieldLength.UNLIMITED);
    Document doc = new Document();
    Field fd = new Field(FIELD_NAME, content, Field.Store.YES,
        Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS);
    doc.add(fd);
    writer.addDocument(doc);
    writer.optimize();
    writer.close();


    IndexReader reader = IndexReader.open(ramDir);
    String queryString = QUERY;

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    IndexWriter writer = new IndexWriter(ramDir, analyzer, MaxFieldLength.UNLIMITED);
    Document doc = new Document();
    Field fd = new Field(FIELD_NAME, content, Field.Store.YES,
        Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS);
    doc.add(fd);
    writer.addDocument(doc);
    writer.optimize();
    writer.close();


    IndexReader reader = IndexReader.open(ramDir);
    String queryString = QUERY;

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